Casio WK-1200 Manuel d'utilisateur télécharger pdf (Page 7)

— 6 —

RESET CIRCUIT

When batteries are set or an AC adapter is connected, the reset IC provides a low pulse to the CPU. The

CPU then initializes its internal circuit, and clears the working storage RAM.

When the power switch is pressed, the CPU receives a low pulse of POWER signal. The CPU sends APO

signal to the power supply circuit, also sends a reset signal to the DSP.

LCD BACKLIGHT

When voltage CVDD is supplied, transistors Q501 and 502 start oscillation.

From the oscillation voltage, transformer T501 generates about 600 V which is necessary for lighting the

backlight.

Reset IC

IC2

RN5VD40AA

DSP

LSI2

HG51B277FB-1

VDD

Reset signal

To power supply circuit

VDD

Battery set

RESET

VDD

POWER

From power switch

NMI

APO

PLE

CPU

LSI1

GT-913F

SCKO

10 1

C502

(Bottom View)

NT-07

T501

CFL1

L501

LHL08TB101K

CVDD

C104FA

C104M

2SD965R 2SD965R

C501

R501

4.7K

Q501

CP14

Q502

C516

23 32

HMBV26BG1W63N/AZ

DE0405-979SL180J2K

1 2 3 4 5 6 7 8 9 10 11 12 ... 24 25

Commentaires sur ces manuels

Pas de commentaire

Casio WK-1200 Manuel d'utilisateur Page 7

Commentaires sur ces manuels

Produits connexes et manuels pour Instruments de musique Casio WK-1200